New bean bag.

I do a lot go shooting out of my truck and was looking for a really stable bean bag. I've tried just about everything out there and have even made a couple. They all worked but they also all lacked the ability to "mould' to the window sill. After receiving my Long Lens Bag from John Stanford, Vertex Photography, I decided to order one of his TV Molar bags. The TV stands for Travel Version. Filled with plastic pellets, it weight just a hair under 5lbs and is steady as a rock. The workmanship is top notch as to be expected.
It can be used on the window of the truck or reversed and used on a flat surface. Perfect size and fit for the 500 f4.
I have no relationship with Vertex except being a very satisfied customer.